package com.csjbot.blackgaga.util;

import android.content.Context;
import android.os.Environment;
import android.os.StatFs;

import com.csjbot.cosclient.utils.CosLogger;
import com.csjbot.coshandler.log.Csjlogger;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.math.BigDecimal;

/**
 * Created by xiasuhuei321 on 2017/8/14.
 * author:luo
 * e-mail:xiasuhuei321@163.com
 */

public class FileUtil {
    public static boolean copy(File from, File to) {
        long usableSpace = FileUtil.getSDFreeSize() * 1024 * 1024;
        if (from.length() > usableSpace) {
            CosLogger.debug("内存空间不足");
            return false;
        }

//        if (!to.exists()) to.mkdirs();

        FileInputStream fis = null;
        FileOutputStream fos = null;
        try {
            if (!to.getParentFile().exists()) {
                // 如果父目录不存在，创建
                to.getParentFile().mkdirs();
            }
            if (!to.exists()) {
                // 如果文件不存在，创建
                to.createNewFile();
            }

            fis = new FileInputStream(from);
            fos = new FileOutputStream(to);
            byte[] data = new byte[1024];
            int len = 0;

            while ((len = fis.read(data)) != -1) {
                fos.write(data, 0, len);
                fos.flush();
            }
        } catch (IOException e) {
            e.printStackTrace();
            Csjlogger.debug(e +"拷贝出错！");
            return false;
        } finally {
            if (fis != null) {
                try {
                    fis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

        return true;
    }
    /**
     * 创建文件夹
     *
     * @param filePath
     */
    public static void makeRootDirectory(String filePath) {
        File file = null;
        if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
            try {
                file = new File(filePath);
                if (!file.exists()) {
                    file.mkdirs();
                }
            } catch (Exception e) {

            }
        }
    }
    /**
     * SD卡剩余空间
     *
     * @return
     */
    public static long getSDFreeSize() {
        //取得SD卡文件路径
        File path = Environment.getExternalStorageDirectory();
        StatFs sf = new StatFs(path.getPath());
        //获取单个数据块的大小(Byte)
        long blockSize = sf.getBlockSize();
        //空闲的数据块的数量
        long freeBlocks = sf.getAvailableBlocks();
        //返回SD卡空闲大小
        //return freeBlocks * blockSize;  //单位Byte
        //return (freeBlocks * blockSize)/1024;   //单位KB
        return (freeBlocks * blockSize) / 1024 / 1024; //单位MB
    }

    /**
     * 获取手机内部可用存储空间
     *
     * @param context
     * @return 以M, G为单位的容量
     */
    public static long getAvailableInternalMemorySize(Context context) {
        File file = Environment.getDataDirectory();
        StatFs statFs = new StatFs(file.getPath());
        long availableBlocksLong = 0;
        long blockSizeLong = 0;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
            availableBlocksLong = statFs.getAvailableBlocksLong();
            blockSizeLong = statFs.getBlockSizeLong();
        }

        return availableBlocksLong;
    }

    /**
     * 获取URL中的文件名
     * @param path
     * @return
     */
    public static String getFileName(String path) {
        String fileName = "";
        if (path != null && !path.trim().equals("")) {
            if (path.contains("/")) {
                String[] strArray = path.split("/");
                fileName = strArray[strArray.length - 1];
            }
        }
        return fileName;
    }

    /**
     * @param context
     * @return
     * @throws Exception
     *             获取当前缓存
     */
    public static String getTotalCacheSize(Context context) throws Exception {
        long cacheSize = getFolderSize(context.getCacheDir());
        if (Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED)) {
            cacheSize += getFolderSize(context.getExternalCacheDir());
        }
        return getFormatSize(cacheSize);
    }

    /**
     * @param context
     *            删除缓存
     */
    public static void clearAllCache(Context context) {
        deleteDir(context.getCacheDir());
        if (Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED)) {
            deleteDir(context.getExternalCacheDir());
        }
    }

    private static boolean deleteDir(File dir) {
        if (dir != null && dir.isDirectory()) {
            String[] children = dir.list();
            int size = 0;
            if (children != null) {
                size = children.length;
                for (int i = 0; i < size; i++) {
                    boolean success = deleteDir(new File(dir, children[i]));
                    if (!success) {
                        return false;
                    }
                }
            }

        }
        if (dir == null) {
            return true;
        } else {

            return dir.delete();
        }
    }

    // 获取文件
    // Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/
    // 目录，一般放一些长时间保存的数据
    // Context.getExternalCacheDir() -->
    // SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据
    public static long getFolderSize(File file) throws Exception {
        long size = 0;
        try {
            File[] fileList = file.listFiles();
            int size2 = 0;
            if (fileList != null) {
                size2 = fileList.length;
                for (int i = 0; i < size2; i++) {
                    // 如果下面还有文件
                    if (fileList[i].isDirectory()) {
                        size = size + getFolderSize(fileList[i]);
                    } else {
                        size = size + fileList[i].length();
                    }
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        return size;
    }

    /**
     * 格式化单位
     * 计算缓存的大小
     * @param size
     * @return
     */
    public static String getFormatSize(double size) {
        double kiloByte = size / 1024;
        if (kiloByte < 1) {
            // return size + "Byte";
            return "0K";
        }

        double megaByte = kiloByte / 1024;
        if (megaByte < 1) {
            BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
            return result1.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "KB";
        }

        double gigaByte = megaByte / 1024;
        if (gigaByte < 1) {
            BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
            return result2.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "MB";
        }

        double teraBytes = gigaByte / 1024;
        if (teraBytes < 1) {
            BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
            return result3.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "GB";
        }
        BigDecimal result4 = new BigDecimal(teraBytes);
        return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()
                + "TB";
    }
}
